Robin Lee
I have your apron plane with the A2 iron. It is a delightful tool, a real joy to use.
I typically do not put a micro-bevel on my edged tools. I sense that the apron plane might perform a little better if I did use the micro-bevel on it.
When you developed the tool, was the use of a micro-bevel a consideration?
I sharpen with EZ laps and a leather strop charged with a sharpening compound. It fits my technique to free-hand lap the irons. If I stay with my current practice it is easier not to use the micro-bevel. :-)